Ricoh B003 Service Manual page 321

6.6.4 LASER BEAM PITCH CHANGE MECHANISM
When the LD positioning motor [A] turns, the metal block [B] in contact with the LD
unit housing [C] moves up and down and changes the position of L2 (L1 does not
move).
Both LD unit positions are at fixed distances from the LD unit home position sensor
[D].
Usually, the LD unit moves directly to the proper position. However, when the
number of times that the resolution has changed reaches the value of SP2-109-5
(LD Beam Pitch Adjustment), the LD unit moves to the home position, and this re-
calibrates the LD unit positioning mechanism.
SM
CÓPIA NÃO CONTROLADA
[B]
6-39
CÓPIA NÃO CONTROLADA
LASER EXPOSURE
[D]
[C]
[A]
B004D543.WMF
B003/B004/B006/B007